Car goes slow, Dissapointing 1/4 mile times Options

[HyperDeathKill]

Auto, GT, 50k. Mid 17s with exhaust, intake, underdrive pulley, s-afc. MID 17s. Good lord. Other people say they hit low 16s bone stock, what could be wrong with my car? Where do I start? I'm going to check the compression, plugs, and then wires. Oil is good, anyone else got suggestions?

[97sccelica]

well for one, you have a vert.

the verts are a lot heavier do to the extra renforcement.

who tuned your safc?

also larger wheels tend to slowour cars down, but more so with the ST's

This post has been edited by 97sccelica: Jul 20, 2003 - 9:29 PM

[yep]

damn, mid 17s... stock 14s should get you down to the 16s but i would think some of those other mods you have would cancel out the loss made by the 17" rims...

[HyperDeathKill]

I actually ran with my stock steeles, which were 5 lbs heavier. Only 15 in rims though.

[snadman]

Ishy. I'm afraid now to check my times. I think when I did the whole stopwatch routine we averaged out like 10 runs on this old abandoned road (and don't worry, it wasn't illegal as I asked if I could use the road for this purpose...they said yeah and they blocked off all roads coming to it for me) and yeah I got like 16.7. Not the best of accuracy but pretty close I'm sure. I got same mods cept no s-afc (but i do have retuned ecu) and no underdrive pulleys. So maybe it is because you have a vert?

[bonzaisushi]

my best run was a 17.5 with a .65 r/t and im stock other than my K&n drop in and i have a auto but then again im hatch

[yep]

convertables arent that much heavier than hatchs/coupes. i think its about 175 lbs. i dont think thats going to put you in the 17s though. im pretty sure that convertables and hatches/coupes put out the same power also. it may be different, or maybe im just thinking about the covertable version of a different car...

[Silver94CelicaOw...]

I tend to think it might be the more restrictive 4 speed automatic tranny to blame......i would think my 5spd. would probably lay down 16's on the 1/4 mile, especially if my shifting is quick and pretty well syncronized. Although something might need fine tuning in your engine, and it wouldnt hurt to check i suppose. I really pushed my car tonight and i was pretty impressed with how well it accelerated considering its mostly stock, especially after comparing it to driving that Z4 i drove yesterday....lol....holy crap.....but i mean celicas arent bure-blooded sports cars by any means, so dont expect any real great times, but if you push it just right, our GT's can feel pretty quick.

[ghostdog]

QUOTE (HyperDeathKill @ Jul 20, 2003 - 6:37 PM)

Auto, GT, 50k. Mid 17s with exhaust, intake, underdrive pulley, s-afc. MID 17s. Good lord. Other people say they hit low 16s bone stock, what could be wrong with my car? Where do I start? I'm going to check the compression, plugs, and then wires. Oil is good, anyone else got suggestions?

change fuel filter
pcv valve
clean throttle body
tighten throttle cable
advance timing
run higher octane
check distributor cap
rotor

you shouldn't have any problems at 50k miles, but who knows.

[H8DC3lica94]

i've hit high 14's and mid 15's seconds with my st coupe. But that was before i took out my CAI. i ran with 14inch stock ST tires in front. and 17inch rims in back. and lowered all 4's to the floor. And most my shifts were redline.

[HyperDeathKill]

QUOTE (gh0st_d0g @ Jul 21, 2003 - 11:44 AM)

QUOTE (HyperDeathKill @ Jul 20, 2003 - 6:37 PM) Auto, GT, 50k.  Mid 17s with exhaust, intake, underdrive pulley, s-afc.  MID 17s.  Good lord.  Other people say they hit low 16s bone stock, what could be wrong with my car?  Where do I start?  I'm going to check the compression, plugs, and then wires.  Oil is good, anyone else got suggestions? change fuel filter pcv valve clean throttle body tighten throttle cable advance timing run higher octane check distributor cap rotor you shouldn't have any problems at 50k miles, but who knows.

Whats the PCV valve? I'm ran the highest octane I could for the track (not race fuel but that's really not nessisary). I don't think I'm going to advance my timing, because I'm alreadying running lean with the s-afc, and I don't wanna pay to get it dynoed again quite yet. I already tightened my throttle cable, pretty happy where it is.

But I'll definitly do everything else

I'm going to go next week, I plan also to:

Switch back to my lighter, wider wheels.
Take out the backseat, maybe side seat + spare + jack.
Take out floor mats, and everything else I can.
Run 34 pressure in front, 44 in rear.
Go on a better track day, one that isn't so humid and hot.

I hope by losing this weight I can begin to compensate for the convertible top, and I should of ran with my new wheels instead of my stock steeles before. The tire pressure I hear is key to shaving off time, and the day I went lots of people said they the track conditions were much less than ideal.

[ghostdog]

bad track conditions can definetly screw up your times. I wouldn't be discouraged, but if it happens again maybe be a bit worried

the pcv valve releases excess gasses from the crankcase into the intake manifold. I don't see how a clogged one could add a second to your time but it doesn't hurt to make sure its all working ok.

[HyperDeathKill]

Checked my plugs today, the gap was huge. I'm getting new ones, and I'll be going to the track next week. I'll post my times from then. Wish me luck!

[ToYCeLi8]

I starting to have some problems with my car right now too. I started feeling a huge drop like 2 days ago. MY poor celi isnt picking up speed like it used to.

95 GT, 5spd, short shifter, intake, 2.25" piping, 154K miles

Today for example i know that when we have 2+ people in the car that they will make a big difference. BUT IT WAS JUST ME!!!! Thats how my car has been feeling the last couple of days. I double clutched to beat a red light (PROFESSIONAL DRIVER. KIDS DON'T TRY THIS AT HOME! lol) and it didnt pick up speed? Now what could be wrong with my car???

[snadman]

154k miles? lol that could be wrong. You're double clutching and performance driving a car that needs to be babied to keep surviving. I kill my car and its at 113k....mine prolly ownt even last til 125k....lol. Keep on double clutchin man...thats so fun! you should add 150shot of nitrous and see if that makes ur car die or not. At least it will be fast in the few seconds before you blow up. lol. Sorry I';m really loopy because of some medicationsions so im sorry

[HyperDeathKill]

Well I would suggest checking all the things that everyone here said to check.

[abatardi]

QUOTE (KiLisStalker @ Jul 21, 2003 - 1:23 PM)

i've hit high 14's and mid 15's seconds with my st coupe. But that was before i took out my CAI. i ran with 14inch stock ST tires in front. and 17inch rims in back. and lowered all 4's to the floor. And most my shifts were redline.

What else did you have in that thing? CAI ain't gonna get you 14s with a 1.8L

- aba

[Uppitycracker]

QUOTE (abatardi @ Jul 22, 2003 - 9:17 AM)

QUOTE (KiLisStalker @ Jul 21, 2003 - 1:23 PM) i've hit high 14's and mid 15's seconds with my st coupe. But that was before i took out my CAI. i ran with 14inch stock ST tires in front. and 17inch rims in back. and lowered all 4's to the floor. And most my shifts were redline. What else did you have in that thing? CAI ain't gonna get you 14s with a 1.8L - aba

I second that, there is nooooooooooooo way you got those times. Someone with a 3sgte swap would probably be in between 15 and 13, so how you could be down there with 105hp is just not possible, even with weight reduction, redlining, a cai that adds maybe 1hp, and stock rims, no way.

[XE_Nathaniel]

You think that slow? my convertible is bone stock automatic and when there is 4 people in it I think I run 25's.

-Nate

[kuya1284]

QUOTE (Uppitycracker @ Jul 24, 2003 - 11:08 AM)

QUOTE (abatardi @ Jul 22, 2003 - 9:17 AM) QUOTE (KiLisStalker @ Jul 21, 2003 - 1:23 PM) i've hit high 14's and mid 15's seconds with my st coupe. But that was before i took out my CAI. i ran with 14inch stock ST tires in front. and 17inch rims in back. and lowered all 4's to the floor. And most my shifts were redline. What else did you have in that thing? CAI ain't gonna get you 14s with a 1.8L - aba I second that, there is nooooooooooooo way you got those times. Someone with a 3sgte swap would probably be in between 15 and 13, so how you could be down there with 105hp is just not possible, even with weight reduction, redlining, a cai that adds maybe 1hp, and stock rims, no way.

I third that...